> While the moon is an estimated 2,159 miles (3,475 km) in diameter [...]
Is the article implying that we don't know the Moon's (I assume they're referring to the capital-M one) diameter to at least kilometer-precision...?
Is the article implying that we don't know the Moon's (I assume they're referring to the capital-M one) diameter to at least kilometer-precision...?
To me, an estimate suggests that there's error bars; an approximation suggests that there's variance that we can quantify (or at least we're very confident about our error bars).